1#!/bin/sh 2 3# 4# Copyright (c) 2022 Jason Harmening <jah@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 30 31# Regression test: 32 33# There is an issue, namely, when the lower file is already 34# opened r/w, but its nullfs alias is executed. This situation obviously 35# shall result in ETXTBUSY, but it currently does not. 36 37# Based on nullfs10.sh by pho@, original test scenario by kib@ 38 39. ../default.cfg 40 41md1=$mdstart 42md2=$((md1 + 1)) 43mp1=/mnt$md1 44mp2=/mnt$md2 45mkdir -p $mp1 $mp2 46set -e 47for i in $mp1 $mp2; do 48 mount | grep -q "on $i " && umount -f $i 49done 50for i in $md1 $md2; do 51 mdconfig -l | grep -q md$i && mdconfig -d -u $i 52done 53 54mdconfig -a -t swap -s 4g -u $md1 55mdconfig -a -t swap -s 4g -u $md2 56newfs $newfs_flags -n md$md1 > /dev/null 57newfs $newfs_flags -n md$md2 > /dev/null 58mount /dev/md$md1 $mp1 59mount /dev/md$md2 $mp2 60 61mkdir $mp2/shadow 62cp /bin/ls $mp2/shadow/ 63mount -t unionfs -o noatime $mp1 $mp2 64set +e 65 66mount | grep -E "$mp1|$mp2" 67 68chmod 777 $mp1 69chmod 777 $mp2 70 71chmod +w $mp2/shadow/ls 72sleep 2 >> $mp2/shadow/ls & 73sleep .5 74 75# This line should cause a "$mp1/shadow/ls: Text file busy" error 76$mp1/shadow/ls -l /bin/ls $mp1 $mp2 && echo FAIL || echo OK 77kill $! 78wait 79 80while mount | grep -q "$mp2 "; do 81 umount $mp2 || sleep 1 82done 83 84while mount | grep -q "$mp1 "; do 85 umount $mp1 || sleep 1 86done 87mdconfig -d -u $md2 88mdconfig -d -u $md1 89